S02-Kinamatics

# S02-Kinamatics - Why Study Motion? How do we know that the...

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Why Study Motion? How do we know that the Earth interacts with the man? Earth

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Types of Motion Constant velocity. Both speed and direction are constant. Accelerated motion. Speed or direction or both change.
Speed

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Some Common Speeds 8,000 mi 93,000,000 mi
The Ultimate Speed 8,000 mi 93,000,000 mi

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Velocity Speed is a scalar. Velocity is a vector. A car travels 5 mi, stops, and then travels 5 mi more. How far is the car from its starting point? Why do me need to deal with vectors?
Constant Velocity v = d/t v av = d total / t total d t v t

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Constant Linear Acceleration x t v t a t
Constant Linear Acceleration Equations v = f(t) dv/dt = slope of the line v dt = area under the line t v v 0 A 1 A 2

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Constant Acceleration Equations 2 v t v 0 v = v 0 + a t d = v 0 t + ½ a t 2 v 2 = v 0 2 + 2 ad If v 0 = 0, then the equations become: v = a t d = ½ a t 2 v 2 = 2 ad
Constant Acceleration Graphs x = x 0 + v 0 t + ½ at 2 v = v 0 t + a t a = dv/dt = constant

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Truck and Car Problem A car is at rest at a red traffic light. Just as the light turns green the car is passed by a truck traveling at a constant velocity of 15.0 m/s. The car immediately accelerates at the constant rate of 3.0 m/s in the same direction as the truck. Both the car and truck travel in the same straight line direction on a level road. a)
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## This note was uploaded on 02/21/2009 for the course PHY 3425345 taught by Professor Dr.schrieber during the Spring '08 term at TCNJ.

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S02-Kinamatics - Why Study Motion? How do we know that the...

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